What is the time bullet take to get at the animal ?

1. The problem statement, all variables and given/known data
A gun designed to shoot with speed 630 m/sec
Find:
a) from which point above the goal must the hunter shoot to catch an animal, if the horizontal distance between them is 700 meter ?
b) What is the max high for the bullet ?
c) what is the time bullet take to get at the animal ?

2. Relevant equations

3. The attempt at a solution
a) 6 meter
b) I cant solve it but the final answer as written in the book is 1.5 meter I dont know how to find it !
c) 1.1 second

I can't tell from the question but is the particle fired from an angle or simply a height above the target in the straight x direction? Nevertheless, any time in projectile motion you are trying to find the maximum height of something the solution is to usually just take the projectile equation for y and find the max of it by setting the derivative equal to 0 and solving; but if there is no angle upward when firing then the max height will obviously be the initial y value.